golang kafka

golang kafka – hello world

https://github.com/Shopify/sarama

https://shopify.github.io/sarama/

 

consumer.go

package main

import (

    "fmt"

    "github.com/Shopify/sarama"

    "log"

    "os"

    "strings"

    "sync"

)

var (

    wg     sync.WaitGroup

    logger = log.New(os.Stderr, "[srama]", log.LstdFlags)

)

func main() {

    sarama.Logger = logger

    consumer, err := sarama.NewConsumer(strings.Split("localhost:9092", ","), nil)

    if err != nil {

        logger.Println("Failed to start consumer: %s", err)

    }

    partitionList, err := consumer.Partitions("hello")

    if err != nil {

        logger.Println("Failed to get the list of partitions: ", err)

    }

    for partition := range partitionList {

        pc, err := consumer.ConsumePartition("hello", int32(partition), sarama.OffsetNewest)

        if err != nil {

            logger.Printf("Failed to start consumer for partition %d: %s\n", partition, err)

        }

        defer pc.AsyncClose()

        wg.Add(1)

        go func(sarama.PartitionConsumer) {

            defer wg.Done()

            for msg := range pc.Messages() {

                fmt.Printf("Partition:%d, Offset:%d, Key:%s, Value:%s", msg.Partition, msg.Offset, string(msg.Key), string(msg.Value))

                fmt.Println()

            }

        }(pc)

    }

    wg.Wait()

    logger.Println("Done consuming topic hello")

    consumer.Close()

}

producer.go

package main

import (

    "github.com/Shopify/sarama"

    "log"

    "os"

    "strings"

)

var (

    logger = log.New(os.Stderr, "[srama]", log.LstdFlags)

)

func main() {

    sarama.Logger = logger

    config := sarama.NewConfig()

    config.Producer.RequiredAcks = sarama.WaitForAll

    config.Producer.Partitioner = sarama.NewRandomPartitioner

    msg := &sarama.ProducerMessage{}

    msg.Topic = "hello"

    msg.Partition = int32(-1)

    msg.Key = sarama.StringEncoder("key")

    msg.Value = sarama.ByteEncoder("你好, 世界!")

    producer, err := sarama.NewSyncProducer(strings.Split("localhost:9092", ","), config)

    if err != nil {

        logger.Println("Failed to produce message: %s", err)

        os.Exit(500)

    }

    defer producer.Close()

    partition, offset, err := producer.SendMessage(msg)

    if err != nil {

        logger.Println("Failed to produce message: ", err)

    }

    logger.Printf("partition=%d, offset=%d\n", partition, offset)

}

此条目发表在Golang, Linux分类目录。将固定链接加入收藏夹。